Chapter 12 Multiplication Facts Through 9
Technology Links
Array ...
shows objects in rows and columns
example 6 X 4 (#rows x #columns) = product
factor x factor = product
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Rows are horizontal.
Columns are vertical.
Multiplication Table;
can be used to find the product of two factors
|
X |
0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 |
| 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1 | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 |
| 2 | 0 | 2 | 4 | 6 | 8 | 10 | 12 | 14 | 16 | 18 |
| 3 | 0 | 3 | 6 | 9 | 12 | 15 | 18 | 21 | 24 | 27 |
| 4 | 0 | 4 | 8 | 12 | 16 | 20 | 24 | 28 | 32 | 36 |
| 5 | 0 | 5 | 10 | 15 | 20 | 25 | 30 | 35 | 40 | 45 |
| 6 | 0 | 6 | 12 | 18 | 24 | 30 | 36 | 42 | 48 | 54 |
| 7 | 0 | 7 | 14 | 21 | 28 | 35 | 42 | 49 | 56 | 63 |
| 8 | 0 | 8 | 16 | 24 | 32 | 40 | 48 | 56 | 64 | 72 |
| 9 | 0 | 9 | 18 | 27 | 36 | 45 | 54 | 63 | 72 | 81 |
6 x 4 (row x column) = 24
Assessment;
Vocabulary; array
Can you draw an array to find a product?
1. 7 x 8 = 2. 8 x 6 3. 5 x 6 =
Can you make two smaller arrays to find each product?
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4. 4 x 9 = _______ x _______ + ________ x ________
there are many possible ways to arrange the two arrays
Can you copy and complete the table?
| X | 4 | 5 | 6 | 7 | 8 |
| 7 | 28 | ? | ? | ? | ? |
Can you multiply factors 0 through 9 to find the product?